news 4's megan mcgrath is live with more. looks like mei xiang is protecting her cub, megan. >> reporter: absolutely. all indications are she's doing a great job. she blt the nest inside and is nestled with her newborn cub. one glimpse, one glimpse only. she's kind of keeping tabs on her little guy at this point. i'm joined by dr. suzanne murray. she's chief veterinarian here. talk about how this came about. she's had false pregnancies before. there was concern this might be another false alarm. >> exactly. she has had false pregnancies. it's so difficult to determine whether she's pregnant or not because she doesn't always feel like having ultrasound exams. during most of her pregnancy, early on, she loves the ultrasound exam, when we can't see anything. but those last two weeks, when we can really see a developing cub, she has no interest. it was a little surprise we got this evening. >> so you guys were watching, and all of a sudden, you heard the sounds of a cub. >> exactly. and the sound of a cub is the important thing.